EUBUY USB2.0 Heated Snowflake Pattern Stripped Half/Full Finger Winter Hand Warmer Gloves Mittens (Gray) Working voltage 3V~6V, power 0.5W USB cable is about 1.5m long with 2 connectors and 1 usb port Ideal for the crowd- doing long time office work Cute design, bright color, feel warmer in the winter Temperature rises more quickly, drive the cold in a minute